CN113046003A - 一种用于复合太阳能电池背板的水性胶黏剂及其复合方法 - Google Patents
一种用于复合太阳能电池背板的水性胶黏剂及其复合方法 Download PDFInfo
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Abstract
本发明属于太阳能背板膜制造领域,具体公开了一种用于复合太阳能电池背板的水性胶黏剂及其复合方法。该水性胶黏剂按照重量份数计,其组成为:水性聚丙烯酸乳液75‑85份,多异氰酸酯固化剂3‑5份,水性抗水解剂1‑3份;偶联剂0.5‑3份,润湿剂0.1‑3份,水10‑20份。该胶黏剂除了安全、环保、经济等优点外、其粘结性能优异,比传统的溶剂型聚氨酯胶具有更佳的抗热,抗湿和户外老化的性能。可利用复合背板厂现有生产设备,实现背板复合其胶水水性化。
Description
技术领域
本发明属于太阳能背板制造领域,特别涉及一种用于复合太阳能电池背板的水性胶黏剂及其复合方法。
背景技术
太阳能背板位于太阳能电池板组件的背面,其主要功能为保护太阳能电池组件在户外环境下受到阳光照射,温度变化,风吹雨淋等环境因素对电池片等材料的侵蚀,起到绝缘、耐候、保护、支撑等作用,是保护太阳能组件在户外长久使用的关键封装材料。
太阳能背板通常由氟膜(PVF/PVDF)、聚酯膜(PET)、聚烯烃类膜等多种膜材通过胶粘复合而成。由于太阳能背板要求长期户外使用(一般设计要求使用年限为25年),胶粘剂会因其被水解导致粘接强度随时间推移下降的情况,从而缩短太阳能背板的使用寿命。
目前,市场上使用的复合型背板其胶粘剂基本以溶剂型聚氨酯胶为主,其耐候性较差,因为含有溶剂,其使用、储运安全风险高,亦不符合环保要求。而水性胶粘剂要么成本太高,干率低不适合量产需求,要么在高温、高湿下易水解而降低粘接强度。
发明内容
为了克服现有胶黏剂的不足,本发明提供了一种用于复合太阳能背板的水性胶粘剂及其复合方法。
水性胶粘剂的配制按重量计,包括以下原料:聚丙烯酸乳液75-85份,硅改性脂肪族多异氰酸酯固化剂3-5份,水性抗水解剂1-3份;水性硅烷偶联剂0.5-3份,润湿剂0.1-3份,水10-20份。
本发明提供的聚丙烯酸乳液按照质量份数的组成为:丙烯酸正丁酯(BA)35-50份,丙烯酸异新酯(2-EHA)40-55,丙烯酸(AA)2-4份,甲基丙烯酸甲酯(MMA)5-15份,苯乙烯8-16份,甲基丙烯酸羟丙酯8-15份,有机硅单体A-17571-3份,引发剂/过硫酸铵0.4-0.6份、PH调节剂/碳酸氢钠0.1-0.15份,反应型乳化剂SR-10 2-4,去离子水120-180份。
本发明的聚丙烯酸乳液是一种核-壳型有机硅改性丙烯酸,其乳液颗粒外层含少量端羧基或羟乙基或羟甲基中的至少一种,提供水中分散性和初粘性,内层包裹憎水的有机硅链段,提高交联成膜后的耐水性和耐候性。
本发明固化剂为硅改性脂肪族多异氰酸酯固化剂(广州冠志新材料科技有限公司的OS-9025型固化剂),是通过杂化改性技术的水可分散型多异氰酸酯,其内含芳香族异氰酸酯结构,极大地提高反应活性,同时含有憎水的有机硅链段,提高耐水性和耐候性。为市场成熟产品。
本发明水性抗水解剂是含有碳化二亚胺官能团的水性抗水解剂(上海朗亿功能材料有限公司的CA-01型交联剂),含有碳化二亚胺官能团(-N=C=N-)的水性抗水解剂低毒环保,能与含有羧基的树脂体系发生交联反应,提高耐水、耐化学品和耐磨性能,同时还能增强与基材的附着力。
本发明润湿剂为伽玛化学的GS-4035润湿剂,提供较好的动态润湿性能。
本发明的胶黏剂用于复合太阳能背板。
复合太阳能背板的方法如下:
复合流程为:基膜放卷-电晕-涂布-热烘-复合-收卷-熟化-包装。
复合工艺参数:
有益效果:
本发明提供了一种专门设计用于太阳能背板复合的水性丙烯酸胶粘剂,除了安全、环保、经济等优点外、其粘结性能优异,比传统的溶剂型聚氨酯胶具有更佳的抗热,抗湿和户外老化的性能。
本发明可利用复合背板厂现有生产设备,实现背板复合其胶水水性化。
具体实施方式
下面结合具体的实施例对本发明进行详细说明。
实施例1
太阳能背板用水性胶黏剂,按重量计,包括以下原料:聚丙烯酸乳液75份,脂肪族多异氰酸酯固化剂3份,水性抗水解剂1份,水性硅烷偶联剂0.5份,润湿剂0.1份,水10份。
聚丙烯酸乳液聚合方法
将100克水,1.5克反应型乳化剂SR-10,0.15克碳酸氢钠搅拌均匀,加入装有搅拌器,温度计,回流冷凝管和滴液漏斗的四口烧瓶中,将丙烯酸正丁酯(BA)4克,丙烯酸异新酯(2-EHA)6克,丙烯酸(AA)0.3克,甲基丙烯酸甲酯(MMA)2克,苯乙烯1.2克,甲基丙烯酸羟丙酯1.5克,加入四口烧瓶中,搅拌并加热到75-80℃,将0.3克引发剂/过硫酸铵和6克去离子水混合均匀5分钟内滴入四口烧瓶中,反应30分钟左右,直到种子乳液变为淡蓝色,将丙烯酸正丁酯(BA)45.5克,丙烯酸异新酯(2-EHA)46.5克,丙烯酸(AA)2.7克,甲基丙烯酸甲酯(MMA)10克,苯乙烯13.8克,甲基丙烯酸羟丙酯13.5克,有机硅单体A-1757 3克混合均匀,让2.25克反应型乳化剂SR-10,0.3克引发剂/过硫酸铵与58克去离子水混合均匀,并加入混合单体搅拌直至形成稳定的预乳化液,将该预乳化液于3小时内滴加入种子乳液中,然后保温1小时,降温中和过滤出料,得到水性聚丙烯酸乳液(固含量48%)。
胶黏剂的制备方法为:
a)在干净容器中称取水性聚丙烯酸乳液75份(固含量48%);
b)缓慢开动搅拌,将转速升至3赫兹,搅拌中加入多异氰酸酯固化剂3份,提高搅拌速度至5赫兹,搅拌10分钟至固化剂完全溶解,混合液体呈乳白色。
c)搅拌中再缓慢匀速加入水性抗水解剂剂1份;偶联剂0.5份,润湿剂0.1份,水10份,然后再原速搅拌10分钟。
d)停止搅拌,将所得胶液用250目滤网过滤。
e)将滤得胶液静止稳定60分钟,待气泡排尽,检测粘度,合格即可用。配置好的乳液必须在8小时内使用完全。
复合工艺:
实施例2
水性太阳能背板胶,按重量计,包括以下原料:聚丙烯酸乳液80份,脂肪族多异氰酸酯固化剂4份,水性抗水解剂2份,水性硅烷偶联剂2份,润湿剂2份,水15份。
聚丙烯酸乳液制备方法同实施例1。
胶黏剂的制备方法为:
a)在干净容器中称取水性聚丙烯酸乳液80份(固含量48%);
b)缓慢开动搅拌,将转速升至3赫兹,搅拌中加入多异氰酸酯固化剂4份,提高搅拌速度至5赫兹,搅拌10分钟至固化剂完全溶解,混合液体呈乳白色。
c)搅拌中再缓慢匀速加入水性抗水解剂2份;偶联剂2份,润湿剂2份,水15份,然后再原速搅拌10分钟。
d)停止搅拌,将所得胶液用250目滤网过滤。
e)将滤得胶液静止稳定60分钟,待气泡排尽,检测粘度,合格即可用。配置好的乳液必须在8小时内使用完全。
复合工艺:
实施例3
水性太阳能背板胶,按重量计,包括以下原料:聚丙烯酸乳液85份,脂肪族多异氰酸酯固化剂5份,水性抗水解剂(碳化二亚胺)3份;水性硅烷偶联剂3份,润湿剂3份,水20份。
聚丙烯酸乳液制备方法同实施例1。
胶黏剂的制备方法同实施例1。
复合工艺:
实施例4
水性太阳能背板胶,按重量计,包括以下原料:聚丙烯酸乳液80份,脂肪族多异氰酸酯固化剂4份,水性抗水解剂1份,水性硅烷偶联剂2份,润湿剂2份,水15份。
聚丙烯酸乳液制备方法同实施例1。
胶黏剂的制备方法同实施例1。
复合工艺:
实施例5
水性太阳能背板胶,按重量计,包括以下原料:聚丙烯酸乳液80份,脂肪族多异氰酸酯固化剂4份,水性抗水解剂2份,水性硅烷偶联剂1份,润湿剂2份,水15份。
胶黏剂的制备方法同实施例1。
复合工艺:
对比实施例1
水性太阳能背板胶,按重量计,包括以下原料:聚丙烯酸乳液(欧宝迪树酯(深圳)有限公司AC75066)80份,脂肪族多异氰酸酯固化剂4份,水性抗水解剂2份,水性硅烷偶联剂2份,润湿剂2份,水15份。
胶黏剂的制备方法同实施例2。
复合工艺:
对比实施例2
水性太阳能背板胶,按重量计,包括以下原料:聚丙烯酸乳液80份,非硅改性异氰酸酯固化剂(广州冠志新材料科技有限公司的OS-9019型固化剂)4份,水性抗水解剂2份,水性硅烷偶联剂2份,润湿剂2份,水15份。
聚丙烯酸乳液制备方法同实施例1。
胶黏剂的制备方法同实施例2。
复合工艺:
复合熟化后,分别测试各实施例和对比实施例初始剥离强度和水煮24小时后的剥离强度结果,具体见表1:
测试的标准或具体方法
1、耐温测试:将复合好的产品,裁切成A4大小的样品,放入150℃的恒温鼓风干燥箱内,10分钟后取出,静置至常温,目视检查其外观,标准要求:O膜和T膜面无泡点,边角无收缩;确保复合粘接合格。
2、剥离强度测试:按照国标GB/T 2790-1995执行。
3、水煮24小时测试:将产品裁切成A5大小,浸入98±2℃的热水中24小时后取出,在23±2℃的环境中静置24小时后,测试剥离强度。
表1
Claims (9)
1.一种用于复合太阳能电池背板的水性胶黏剂,其特征在于,所述水性胶黏剂按照重量份数计,其组成为:水性聚丙烯酸乳液75-85份,多异氰酸酯固化剂3-5份,水性抗水解剂1-3份;水性偶联剂0.5-3份,润湿剂0.1-3份,水10-20份。
2.根据权利要求1所述的水性胶黏剂,其特征在于,所述水性聚丙烯酸乳液按照质量份数的组成为:丙烯酸正丁酯(BA)35-50份,丙烯酸异新酯(2-EHA)40-55,丙烯酸(AA)2-4份,甲基丙烯酸甲酯(MMA)5-15份,苯乙烯8-16份,甲基丙烯酸羟丙酯8-15份,有机硅单体A-1757 1-3份,引发剂/过硫酸铵0.4-0.6份、PH调节剂/碳酸氢钠0.1-0.15份,反应型乳化剂SR-10 2-4,去离子水120-180份。
3.根据权利要求1所述的水性胶黏剂,其特征在于,所述多异氰酸酯固化剂为有机硅杂化改性的水分散型多异氰酸酯。
4.根据权利要求1所述的水性胶黏剂,其特征在于,所述水性抗水解剂含有碳化二亚胺官能团(-N=C=N-)。
5.根据权利要求1所述的水性胶黏剂,其特征在于,所述水性偶联剂为硅烷偶联剂,润湿剂为有机硅类润湿剂。
6.一种根据权利要求1所述的水性胶黏剂的制备方法,其特征在于,所述制备方法为:
a)在干净容器中称取水性聚丙烯酸乳液;
b)缓慢开动搅拌,将转速升至3赫兹,搅拌中加入多异氰酸酯固化剂,提高搅拌速度至5赫兹,搅拌10分钟至固化剂完全溶解,混合液体呈乳白色;
c)搅拌中再缓慢匀速加入水性抗水解剂,水性偶联剂,润湿剂,水,然后再原速搅拌10分钟;
d)停止搅拌,将所得胶液用250目滤网过滤;
e)将滤得胶液静止稳定60分钟,待气泡排尽,检测粘度,合格即可用。
7.根据权利要求1所述的水性胶黏剂用于复合太阳能电池板的方法,其特征在于,所述方法复合工艺为:基膜放卷-电晕-涂布-热烘-复合-收卷-熟化-包装。
8.根据权利要求7所述的水性胶黏剂用于复合太阳能电池板的方法,其特征在于,所述涂布上胶量20g/m2,干膜厚度7~9um,烘干过程线速度35m/min,烘道长度20m,烘烤温度120℃,复合温度60~90℃,复合压力4~6Mpa;复合后熟化50℃*48H。
9.根据权利要求7所述的水性胶黏剂用于复合太阳能电池板的方法,其特征在于,所述基膜为:PVF膜,PET膜或PO膜。
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